Extending XPointer to handle external entities

Date:      Wed, 30 Aug 2000 15:52:17 -0400
From:      "Eve L. Maler" eve.maler@east.sun.com
To:        xml-dev@lists.xml.org
Subject:   Extending XPointer to handle external entities

I've been asked to post this message on behalf of the W3C XML Linking WG.

The WG is considering a change to XPointer [1] to allow it to address arbitrary external parsed entities (specifically, multiple-rooted entities that cannot be served as */xml). The comment that raised this issue is at [2]. Right now there's a lot of support on the WG for making this change, on the grounds that:

It removes a restriction and leaves us with a more elegant model (ChildSeq would no longer be restricted to start with /1; it could use /n).
It would more closely match the XPath/XSLT model, which already allows this.
With a seemingly inexpensive change, XPointer becomes more functional in dealing with XML resources.

If we made this change, it would allow XPointer to become the fragment identifier language for */xml-external-parsed-entity as well as */xml.

We realize this change might require a change to XPointer implementations that people are working on, so we are soliciting feedback: Would this cause you difficulty at this stage? Please send your comments on this matter to www-xml-linking-comments@w3.org.

Thanks,

Eve

[1] http://www.w3.org/TR/xptr
[2] http://lists.w3.org/Archives/Public/www-xml-linking-comments/2000AprJun/0039.html

Eve Maler                                          +1 781 442 3190
Sun Microsystems XML Technology Center    eve.maler @ east.sun.com

Prepared by Robin Cover for The XML Cover Pages archive. See related references in "XML Linking Language."

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